A mine hoist frame with corrosion resistance, low temperature toughness and strong load bearing

Abstract

The present application relates to a kind of mine hoist frame with corrosion resistance low temperature toughness strong bearing, belong to hoisting equipment technical field, the present application is directed to the problems of existing mine hoist frame weld easy corrosion, poor low temperature toughness and bearing promotion limit.This frame includes two main beams and multiple transverse bearing beams, main beam includes welded fixed frame matrix and airtight baffle, the weld is equipped with the first protection component consisting of magnesium-based sacrificial anode inlay and breathable ceramic isolation liner, for providing electrochemical corrosion protection, multiple corrugated reinforcement webs are embedded in frame matrix, for dispersing stress to improve low temperature toughness, the outer end of transverse bearing beam is equipped with impermeable protection assembly, for blocking corrosion medium erosion butt weld, the present application significantly improves the corrosion resistance, low temperature toughness and bearing capacity of frame by sacrificial anode protection, corrugated web enhanced stress dispersion and node multilayer sealing, suitable for the complex operating environment of high-cold, high-humidity and high-corrosion mine.

Description

Technical Field

[0001] This invention belongs to the field of hoisting equipment technology and relates to a mining crane frame with corrosion resistance, low temperature toughness, and high load-bearing capacity. Background Technology

[0002] The frame of a mining crane is the core load-bearing component of mining lifting operations. It is mainly used to support the lifting mechanism, bear the operating load, and adapt to the complex working environment of underground and open mines. Its structural stability, corrosion resistance, and low-temperature toughness directly determine the operational safety and service life of the lifting equipment. Currently, mining operations generally face problems such as high cold, high humidity, high dust, and acidic slurry erosion. In particular, the low-temperature environment in winter in cold mining areas, as well as the special working conditions of dampness, prohibition of open flames, and slurry accumulation underground, place extremely high demands on the comprehensive performance of mining crane frames. The low temperature referred to in this application is (-40℃-0℃).

[0003] Existing mining crane frames suffer from numerous intractable technical defects during actual use, severely impacting equipment lifespan and operational safety.

[0004] Critical areas such as frame welds and longitudinal and transverse beam joints are prone to the accumulation of corrosive media such as acidic mineral slurry and rainwater. Existing anti-corrosion methods mostly rely on coating protection, but the coating is easily damaged by friction from mining sand and gravel. Once pinholes or damage occur, corrosive media can penetrate into the metal, causing electrochemical corrosion, which will quickly lead to weld corrosion and thinning of the base material, significantly shortening the service life of the frame. Existing protective structures cannot effectively block the capillary penetration of water, and long-term immersion of joint welds in water will accelerate corrosion failure.

[0005] Traditional vehicle frames often increase load-bearing capacity by thickening plates, which not only increases the overall weight of the vehicle and increases operating energy consumption, but also further reduces the low-temperature toughness of the materials, making them unsuitable for the dual requirements of heavy-duty and flexible operation in mining.

[0006] Therefore, we propose a mining crane frame with corrosion resistance, low-temperature toughness, and high load-bearing capacity to solve the problems mentioned above. Summary of the Invention

[0007] In view of this, in order to solve the above problems, the present invention provides a mining crane frame with corrosion resistance, low temperature toughness, and high load-bearing capacity.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a mining crane frame with corrosion resistance, low temperature toughness, and high load-bearing capacity, comprising: a frame composed of two main beams and multiple transverse load-bearing beams;

[0009] The main beam includes a frame base and a sealed partition plate. The frame base and the sealed partition plate are welded and fixed. A first protective component is provided at the weld joint. The first protective component includes a magnesium-based sacrificial anode insert attached to the weld joint and a breathable ceramic isolation liner attached to the outside of the magnesium-based sacrificial anode insert. The magnesium-based sacrificial anode insert preferentially corrodes through the electrode potential difference to provide cathodic protection for the weld joint and the base material.

[0010] Multiple seepage prevention and protection assemblies are respectively installed on the outer end of the transverse load-bearing beam to prevent corrosive liquids from eroding the butt weld between the main beam and the transverse load-bearing beam;

[0011] The bottom wall of the frame base is provided with pipes along the length direction, and prestressed steel strands are threaded inside the pipes. Connecting seats are fixed at the bottom of both ends of the frame base, and prestressed anchoring components are assembled on the connecting seats. The two ends of the prestressed steel strands are fixed and tensioned with the prestressed anchoring components to form the pre-arch of the main beam to offset the deflection under heavy load.

[0012] Multiple corrugated reinforced webs are embedded inside the frame base. The crests of the corrugated reinforced webs are spot-welded to the top wall of the frame base, and the crests of the corrugated reinforced webs are spot-welded to the outer wall of the pipes arranged on the bottom wall of the frame base. This is used to distribute load stress and improve low-temperature toughness.

[0013] Furthermore, the seepage prevention and protection assembly includes two U-shaped protective covers I that are mated together. One side of each U-shaped protective cover I is integrally fixed with a U-shaped bonding plate II that abuts against the main beam. Two assembly connecting lugs are fixed between the U-shaped protective cover I and the U-shaped bonding plate II. A bolt is provided through the two upper and lower opposing assembly connecting lugs. Nut rings are fixed to the bottom of the two lower assembly connecting lugs. The bottom end of the bolt is threaded into the nut ring. The mating distance between the two U-shaped protective covers I can be adjusted by rotating the bolt.

[0014] Furthermore, multiple sealing strips I are fixedly connected to the inner side of the U-shaped protective cover I, and multiple sealing strips II that abut against the main beam are provided on the side of the U-shaped bonding plate II near the main beam. The sealing strips I and sealing strips II work together to form a multi-layer sealing barrier to prevent external corrosive liquids from seeping into the joint gap.

[0015] Furthermore, slots are provided on the top wall, bottom wall, and outer side of the sealed partition of the frame base. The magnesium-based sacrificial anode insert is L-shaped, and its two inner sides are integrally provided with inserts that fit into the slots.

[0016] Furthermore, the breathable ceramic insulating liner is adapted to the contour of the magnesium-based sacrificial anode insert, and both sides are integrally provided with an extended connecting section. The two extended connecting sections are respectively fixed to the frame matrix and the sealing partition.

[0017] Furthermore, the bottom of the U-shaped bonding plate II below is provided with multiple drainage holes I, the drainage holes I being located between two adjacent sealing strips I, and drainage holes II are provided at the bottom of the U-shaped bonding plate II below and at the bottom of the multiple sealing strips II below.

[0018] Furthermore, the top of the assembly connecting ear is fixedly connected to an internally threaded sleeve, and the internal thread of the internally threaded sleeve engages with a threaded rod. A U-shaped receiving groove is opened on the inner side of the U-shaped fitting plate II, and an embedded positioning plate is embedded in the U-shaped receiving groove. Multiple sealing strips II are fixedly connected to the embedded positioning plate. One end of the threaded rod abuts against the embedded positioning plate. The contact force between the sealing strip II and the main beam can be adjusted by rotating the threaded rod.

[0019] Furthermore, the top of the embedded positioning plate described below is fixedly connected with multiple positioning pins, and the bottom of the embedded positioning plate described above is provided with holes for insertion and engagement with the positioning pins, so as to avoid misalignment or displacement during use.

[0020] Furthermore, the outer end of the threaded rod is provided with a positioning insertion hole, and a positioning insertion rod for limiting the bolt is slidably embedded in the positioning insertion hole. An axial limiting sleeve for limiting the positioning insertion rod is fixedly connected to the top of the assembly connecting lug. An annular limiting retaining ring and a spring are sleeved on the outer wall of the positioning insertion rod. The annular limiting retaining ring is located on one side of the bolt. The two ends of the spring abut against the outer side of the annular limiting retaining ring and the outer end of the positioning insertion rod, respectively. The spring is used to drive the positioning insertion rod to reset.

[0021] Furthermore, the outer wall of the alignment plug rod is fixed with multiple protrusions, the alignment plug hole is provided with a groove that matches the protrusions, the outer wall of the bolt is provided with multiple limiting grooves that cooperate with the protrusions, and the outer end of the alignment plug rod is provided with an internal hexagonal drive hole.

[0022] Push the alignment rod to disengage the protrusion from the limiting groove. Rotate the threaded rod or bolt. After loosening, the spring drives the alignment rod to reset, and the protrusion is inserted into the limiting groove to lock.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. The present invention discloses a mining crane frame with corrosion resistance, low temperature toughness and high load-bearing capacity. The main beam of the frame adopts a box-shaped closed structure formed by welding a frame base and a sealed partition plate. Multiple sets of corrugated reinforcing webs are arranged inside. The wave-shaped structure of the corrugated reinforcing webs can evenly disperse the concentrated stress generated by heavy-load operation and vibration, change the stress transmission direction, cut off the continuous transmission of stress along the length of the main beam, and reduce the stress accumulation in the weld and heat-affected zone.

[0025] 2. The mining crane frame disclosed in this invention has corrosion resistance, low temperature toughness, and high load-bearing capacity. A first protective component is set on the outside of the weld between the frame base and the sealed partition plate. The magnesium-based sacrificial anode insert relies on its own electrode potential difference with the frame base material to preferentially undergo oxidation corrosion under the action of corrosive media, providing cathodic protection for the weld and base material. This electrochemically blocks the steel corrosion process and avoids the hidden damage caused by electrochemical corrosion. The breathable ceramic isolation liner on the outside of the magnesium-based sacrificial anode insert can not only prevent the hard sand and gravel in the mine from abrading the anode components, but also ensure that the corrosive media can smoothly pass through the breathable pores to contact the anode, ensuring the continuous and stable performance of the anti-corrosion effect.

[0026] 3. The mining crane frame disclosed in this invention has corrosion resistance, low temperature toughness, and high load-bearing capacity. The anti-seepage protection assembly at the joint of the longitudinal and transverse beams forms a multi-layer sealing barrier through sealing strip I and sealing strip II, which prevents corrosive media from seeping into the joint gap. With the help of drainage holes I and drainage holes II, a small amount of seeping liquid can be discharged in time, eliminating dead corners of water accumulation at the joint. It blocks the corrosion path from a physical level, comprehensively improves the overall corrosion resistance of the frame, and greatly extends the service life of the frame.

[0027] 4. The mining crane frame disclosed in this invention has corrosion resistance, low temperature toughness, and high load-bearing capacity. Prestressed steel strands are inserted inside the pipes at the bottom of the frame base. Tensioning force is applied to the steel strands through the prestressed anchoring components on the connecting seats at both ends, so that the main beam forms an upward pre-arch shape in advance. This can effectively counteract the downward bending deformation caused by heavy-load operation. Without increasing the thickness of the frame body plate or the weight of the whole vehicle, the heavy-load bearing capacity of the frame is significantly improved and the energy consumption of equipment operation is reduced.

[0028] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a three-dimensional structural schematic diagram of a mining crane frame with corrosion resistance, low temperature resistance, high toughness, and strong load-bearing capacity according to the present invention.

[0031] Figure 2 This is a schematic diagram of the corrugated reinforced web and pipe fitting installation structure of a mining crane frame with corrosion resistance, low temperature toughness, and high load-bearing capacity according to the present invention.

[0032] Figure 3This is a schematic diagram of the magnesium-based sacrificial anode insert installation structure for a mining crane frame with corrosion resistance, low-temperature toughness, and high load-bearing capacity according to the present invention.

[0033] Figure 4 for Figure 3 Enlarged structural diagram of section A in the middle;

[0034] Figure 5 This is a schematic diagram of the anti-seepage protection assembly structure of a mining crane frame with corrosion resistance, low temperature toughness, and high load-bearing capacity according to the present invention.

[0035] Figure 6 This is a schematic diagram of the installation structure of the sealing strip II of a mining crane frame with corrosion resistance, low temperature toughness, and high load-bearing capacity according to the present invention.

[0036] Figure 7 This is a schematic diagram of the installation structure of the sealing strip I of a mining crane frame with corrosion resistance, low temperature toughness, and high load-bearing capacity according to the present invention;

[0037] Figure 8 This is a schematic diagram of the alignment plug-in rod, bolt, and threaded rod structure of a mining crane frame with corrosion resistance, low temperature toughness, and high load-bearing capacity according to the present invention.

[0038] Reference numerals: 1. Main beam; 11. Frame base; 12. Corrugated reinforced web; 13. Pipe fitting; 14. Connecting seat; 15. Prestressed anchoring assembly; 16. Prestressed steel strand; 17. Sealing partition; 18. Magnesium-based sacrificial anode insert; 19. Insert strip; 110. Slot; 111. Breathable ceramic isolation liner; 112. Extended connecting section; 2. Transverse load-bearing beam; 3. Waterproofing and protection assembly; 31. U-shaped protective cover I; 311. Sealing strip I; 312. Drainage hole I; 3 2. U-shaped bonding plate II; 321. U-shaped receiving groove; 322. Embedded positioning plate; 323. Positioning pin; 324. Sealing strip II; 325. Drainage hole II; 33. Assembly connecting lug; 331. Axial limiting sleeve; 332. Threaded rod; 333. Alignment insertion hole; 334. Alignment insertion rod; 335. Internal hexagonal drive hole; 336. Annular limiting retaining ring; 337. Spring; 338. Protrusion; 339. Internal threaded sleeve; 34. Bolt; 341. Limiting groove. Detailed Implementation

[0039] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0041] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0042] Example 1

[0043] like Figures 1-4 As shown, a mining crane frame with corrosion resistance, low temperature toughness, and high load-bearing capacity is used in complex operating sites such as high-altitude and cold mining areas and highly corrosive mines. The entire frame is assembled from two main beams 1 and multiple transverse load-bearing beams 2. The two main beams 1 are arranged in parallel, and the multiple transverse load-bearing beams 2 are evenly placed between the two main beams 1, together forming a complete frame support structure.

[0044] The main beam 1 adopts a closed box-type structure, consisting of a frame base 11 and a sealed partition plate 17 joined together. The joint between the frame base 11 and the sealed partition plate 17 is fixedly connected by welding, forming a sealed and complete hollow cavity. To prevent condensation from accumulating in the hollow cavity due to temperature differences, at least one micro-diameter drainage hole (not shown in the figure) is provided at the lowest point of the bottom of the frame base 11. The diameter of this drainage hole is 0.5mm-1mm, ensuring gas exchange while preventing capillary infiltration of external liquids. Alternatively, a desiccant pack (not shown in the figure) can be pre-placed inside the hollow cavity. The sealed hollow cavity can isolate external moisture and corrosive gases from directly intruding into the cavity, effectively slowing down changes in the internal metallographic structure of the steel under low-temperature conditions, and reducing the probability of cold brittle deformation and material performance degradation in the main frame from the basic structural level. On the outer wall of the frame base 11 and the outer wall of the sealed partition plate 17, slots 110 are uniformly provided along the weld seam formed by the splicing of the two. The slots 110 provide a stable limiting basis for the subsequent assembly of anti-corrosion components.

[0045] A first protective component is installed on the outer side of the weld formed by the butt joint between the frame base 11 and the sealed partition plate 17. The first protective component includes a magnesium-based sacrificial anode insert 18 that is fitted to the outer side of the weld. The magnesium-based sacrificial anode insert 18 is designed as an L-shape. The two inner bent surfaces of the magnesium-based sacrificial anode insert 18 are integrally formed with insert strips 19. The insert strips 19 can directly correspond to the internal space of the slot 110. The magnesium-based sacrificial anode insert 18 is quickly positioned and installed by means of plug-in connection. The end of the slot 110 is provided with a limiting block. After the magnesium-based sacrificial anode insert 18 is inserted into the slot 110, it is axially limited by the limiting block to prevent the magnesium-based sacrificial anode insert 18 from loosening or falling out under the vibration condition of the frame. The plug-in assembly mode does not require drilling, welding or other processing operations on the frame base 11 and the sealed partition plate 17. It will not damage the integrity of the load-bearing structure of the frame base material, nor will it form stress concentration gaps on the surface of the base material. The subsequent disassembly and assembly operations will not cause damage to the frame body.

[0046] The magnesium-based sacrificial anode insert 18 forms an electrochemical protection system based on its material properties. The electrode potential of magnesium-based materials (such as pure magnesium, magnesium alloys, or magnesium-based composite materials) is much lower than that of the carbon steel base material used in the frame. When conductive media such as rainwater and acidic slurry in the mining environment cover the frame surface, the media will form a complete electrolytic circuit between the magnesium-based sacrificial anode insert 18 and the frame base material. The magnesium-based sacrificial anode insert 18 will preferentially undergo oxidation corrosion reaction, thereby keeping the frame weld seams and surrounding metal base material in a cathodic protection state for a long time. This electrochemically blocks the oxidation and rusting process of the steel itself, significantly slowing down the aging and corrosion rate of the frame weld seams and base metal. The magnesium-based sacrificial anode insert 18 is a periodically consumable component, and its corrosion status needs to be checked every 6-12 months. When the residual thickness of the magnesium-based sacrificial anode insert 18 is less than 30% of the original thickness, it can be directly removed from the slot 110 and replaced with a new insert to continue to play a cathodic protection role.

[0047] A breathable ceramic insulating liner 111 is attached to the outer surface of the magnesium-based sacrificial anode insert 18. The overall shape of the breathable ceramic insulating liner 111 is adapted to fit the L-shaped magnesium-based sacrificial anode insert 18. The two sides of the breathable ceramic insulating liner 111 extend outward to form an extended connecting section 112. The two extended connecting sections 112 are fixedly connected to the outer wall of the frame base 11 and the outer wall of the sealed partition plate 17, respectively. This can not only improve the stability of the breathable ceramic insulating liner 111 itself, but also seal and cover the small splicing gaps between components. The breathable ceramic insulating liner 111 has through-type breathable pores inside, which can effectively block hard sand, slag and other solid debris generated during mining operations. This prevents hard materials from directly rubbing and wearing down the inner magnesium-based sacrificial anode insert 18. At the same time, external corrosive media with electrical conductivity can pass through the breathable pores and contact the magnesium-based sacrificial anode insert 18, ensuring that the electrochemical anti-corrosion protection can be continuously and stably performed and will not fail due to physical obstruction.

[0048] Multiple sets of corrugated reinforcing webs 12 are arranged inside the hollow cavity formed by the frame base 11. All corrugated reinforcing webs 12 are arranged sequentially along the length of the frame base 11. The corrugated reinforcing webs 12 are integrally processed into a continuous wave-like structure. The upper crest of the corrugated reinforcing webs 12 fits against the inner side of the top wall of the cavity of the frame base 11, and the lower crest of the corrugated reinforcing webs 12 fits against the pipe 13 on the bottom wall of the cavity of the frame base 11. The crest positions are fixedly connected to the inner wall of the cavity by spot welding. The wave-shaped corrugated reinforcing webs 12 have flexible deformation buffering capacity. When the frame is subjected to lifting operation loads and field driving vibration loads, the concentrated stress generated by various external forces can be evenly distributed by the structural characteristics of the corrugated surface, changing the stress transmission direction that was originally concentrated at the welding point, effectively reducing the damage to the weld caused by long-term stress accumulation. In low-temperature operating environments, a uniformly distributed stress state can reduce the possibility of crack initiation and propagation at weld locations from the internal structure. At the same time, the segmented corrugated reinforcing web 12 can also cut off the path of stress transmission along the length of the main beam 1, further improving the overall structural toughness and fatigue resistance of the main beam 1.

[0049] Multiple pipe fittings 13 are fixedly installed along the length of the frame base 11 on its bottom inner wall. The pipe fittings 13 are arranged parallel to the frame base 11 and are independent closed tubular structures, isolated from the hollow cavity inside the frame base 11. This prevents external moisture from entering the internal cavity of the main beam 1 through the pipe fittings, ensuring a dry and stable environment for the internal corrugated reinforced web 12. Prestressed steel strands 16 are threaded through the hollow interior of the pipe fittings 13. Connecting seats 14 are fixedly installed at the bottom of both ends of the frame base 11. Matching prestressed anchoring components 15 are fitted onto the surface of the connecting seats 14. After the two ends of the prestressed steel strands 16 extend outward from the pipe fittings 13, the ends are stably fixed inside the corresponding prestressed anchoring components 15. Workers can apply a stable tension force to the prestressed steel strands 16 using the prestressed anchoring components 15. After tensioning, the main beam 1 can be driven to form an upward convex pre-arch shape. When the frame bears heavy loads and shows a downward bending deformation tendency, the pre-arch structure of the main beam 1 can generate a reverse support force, effectively offsetting most of the vertical bending deformation. By relying on the prestressed load-bearing optimization method, the overall heavy load-bearing capacity of the frame can be greatly improved without increasing the thickness of the frame's main body plates. At the same time, the overall weight of the vehicle can be reasonably controlled, reducing energy consumption during daily operation and use.

[0050] Example 2

[0051] Reference Figures 1-8This invention provides a new technical solution: a mining crane frame with corrosion resistance, low temperature toughness, and high load-bearing capacity, which also includes a seepage protection assembly 3. Each transverse load-bearing beam 2 is fitted with a seepage protection assembly 3 at the outer ends near the main beam 1. The seepage protection assembly 3 is composed of two U-shaped protective covers I 31 that fit together. The U-shaped protective covers I 31 are integrally injection molded from acid-resistant composite plastic material. This material can resist the erosion of acidic slurry and humid moisture in the mine for a long time and is not prone to aging, cracking, deformation, or damage. The side of the U-shaped protective cover I31 is integrally fixed with a U-shaped bonding plate II32. After the waterproof and protective assembly 3 is fully assembled, the outer end face of the U-shaped bonding plate II32 is tightly attached to the outer wall surface of the main beam 1, realizing the overall wrapping protection of the docking node. The contact surfaces of the U-shaped bonding plate II32 and the main beam 1, and the U-shaped protective cover I31 and the transverse bearing beam 2 are all provided with elastic buffer pads (not shown in the figure). The buffer pads are made of neoprene rubber and are used to absorb the impact load generated by equipment vibration and prevent the U-shaped protective cover I31 and the U-shaped bonding plate II32 from fatigue damage due to long-term rigid collision.

[0052] Two assembly connection lugs 33 are provided at the connection and fixing position of the U-shaped protective cover I 31 and the U-shaped bonding plate II 32. A bolt 34 is vertically inserted between the two sets of assembly connection lugs 33 that correspond to each other at the upper and lower positions. A nut ring structure is pre-fixed and welded to the bottom surface of the assembly connection lug 33 located at the lower position. The bottom end of the bolt 34 is connected to the inside of the nut ring by thread engagement. The operator can adjust the fit of the two U-shaped protective covers I 31 by rotating the bolt 34.

[0053] Multiple sealing strips I311 are fixedly adhered to the inner wall of the U-shaped protective cover I31. Multiple sealing strips II324 are fixedly installed on the side of the U-shaped bonding plate II32 closest to the outer wall of the main beam 1. Both sealing strips I311 and II324 are made of acid- and alkali-resistant, aging-resistant rubber. Together, they form a multi-layered annular sealing barrier at the joint between the transverse load-bearing beam 2 and the main beam 1. This effectively prevents external rainwater, acidic slurry, and other corrosive liquids from seeping into the joint gap, reducing the long-term corrosion risk of the weld at the joint. In cases of rust damage due to contact with corrosive media, to further improve sealing reliability, a shape memory alloy spring (not shown in the figure) can be embedded inside the sealing strip I 311 and sealing strip II 324. This shape memory alloy spring continuously provides outward expansion elastic force at room temperature, so that even if the surface of the sealing strip wears during long-term use, it can maintain the contact pressure with the contact surface. In addition, this anti-seepage protection assembly 3 needs to regularly check the wear of the sealing strips every month according to the working conditions of the mining environment, and compensate for the gap by rotating the threaded rod 332 to maintain long-term sealing.

[0054] The bottom wall surface of the U-shaped bonding plate II32 located at the bottom position has multiple drainage holes I312. Each drainage hole I312 is equipped with a one-way valve to prevent external water backflow. All drainage holes I312 are evenly distributed in the empty area between two adjacent sealing strips I311. At the same time, drainage holes II325 are also uniformly opened on the bottom surface of the U-shaped bonding plate II32 and the bottom surface of the sealing strip II324. Each drainage hole II325 is also equipped with a one-way valve. Dustproof filters are embedded in the outer ports of drainage holes I312 and drainage holes II325. The filters cover the outside of the one-way valves to prevent mine dust and slag particles from entering the holes and causing blockage, thus ensuring smooth drainage. During daily use, even if a small amount of liquid seeps into the interior of the anti-seepage protection assembly 3 through the tiny gaps in the sealing structure, the seeping liquid will naturally collect and flow along the contact surfaces between the components. The collected liquid can be discharged directly to the outside of the protection structure through the drainage hole I 312 and the drainage hole II 325 in sequence, completely avoiding the long-term accumulation of liquid inside the node protection structure and continuous immersion corrosion of the metal butt weld.

[0055] The upper end face of the assembly connecting ear 33 at the lower position is fixedly connected to an internal threaded sleeve 339. The internal cavity of the internal threaded sleeve 339 is fitted with a threaded rod 332 through thread engagement. A U-shaped receiving groove 321 is pre-formed on the outer side of the U-shaped fitting plate II 32. An embedded positioning plate 322 is movably placed inside the U-shaped receiving groove 321. All sealing strips II 324 are uniformly fixedly connected to the outer surface of the embedded positioning plate 322. The top surface of the embedded positioning plate 322 located at the lower position is fixedly equipped with multiple positioning pins 323, and the bottom surface of the embedded positioning plate 322 located at the upper position has insertion holes that match the shape of the positioning pins 323. During the assembly process of the upper and lower embedded positioning plates 322 (when the two are fitted onto the transverse bearing beam 2, attention should be paid to the position of the positioning pins 323 and the insertion holes), the positioning pins 323 are inserted into the insertion holes to achieve precise alignment and limitation, which can effectively prevent the upper and lower embedded positioning plates 322 from lateral misalignment and displacement during long-term use. One end face of the threaded rod 332 facing the embedded positioning plate 322 is directly in contact with the surface of the embedded positioning plate 322. When the operator rotates the threaded rod 332, the threaded rod 332 can move smoothly along the axis of the internal threaded sleeve 339, and simultaneously push the embedded positioning plate 322 to make a small position adjustment, thereby changing the degree of contact and compression between the sealing strip II 324 and the outer wall of the main beam 1. This can compensate for the assembly gap caused by wear and loosening of the rubber strip after long-term use, so that the sealing strip II 324 always keeps in close contact with the outer wall of the main beam 1, continuously eliminating water seepage gaps and maintaining the anti-seepage protection effect of the node position for a long time.

[0056] The threaded rod 332 has an alignment insertion hole 333 on one end face away from the embedded positioning plate 322. An alignment insertion rod 334 is slidably assembled in the internal space of the alignment insertion hole 333. An axial limiting sleeve 331 is fixedly installed at the top position of the assembly connecting ear 33. The axial limiting sleeve 331 can limit the maximum sliding stroke of the alignment insertion rod 334, effectively preventing the alignment insertion rod 334 from slipping or falling off during equipment operation vibration. An annular retaining ring 336 is fixedly fitted on the outer rod of the alignment rod 334. The annular retaining ring 336 is located on the side near the rod of the bolt 34. A spring 337 is also fitted on the outer rod of the alignment rod 334. The two ends of the spring 337 abut against the outer wall of the annular retaining ring 336 and the outer end face of the alignment rod 334, respectively. In its naturally extended state, the spring 337 can continuously provide an elastic restoring force to push the alignment rod 334 outward.

[0057] The outer cylindrical surface of the alignment plug rod 334 is integrally formed with multiple protrusions 338. The inner wall of the alignment plug hole 333 is provided with a groove structure that matches the shape of the protrusions 338. Multiple sets of limiting grooves 341 are evenly provided on the outer cylindrical surface of the bolt 34. The protrusions 338 can be directly engaged and embedded in the internal space of the limiting grooves 341. The rotation lock between the alignment plug rod 334 and the bolt 34 is achieved by mechanical engagement, restricting the free rotation of both. The outer end face of the alignment plug rod 334 is provided with an internal hexagonal drive hole 335. On-site personnel can insert the matching hexagonal adjustment tool into the internal hexagonal drive hole 335 and apply a pushing force inward with the tool, causing the alignment plug rod 334 to slide inward along the internal space of the alignment plug hole 333, so that the protrusion 338 completely disengages from the limiting groove 341 on the surface of the bolt 34. At this time, the rotation restriction of the bolt 34 is released. The personnel can either rotate the hexagonal tool to drive the threaded rod 332 to rotate and move, and complete the fitting adjustment of the sealing strip II 324, or directly rotate the bolt 34 to adjust the tightness of the overall enclosure of the waterproof protection assembly 3 to the transverse bearing beam 2. When the inward pushing force is removed by the staff, the alignment plug rod 334 will automatically reset outward under the elastic force of the spring 337, simultaneously causing the protrusion 338 to re-engage into the corresponding limiting groove 341 on the outer wall of the bolt 34, thus completing the mechanical locking between the alignment plug rod 334 and the bolt 34 again. This prevents the threaded rod 332 and the bolt 34 from loosening due to vibration during the operation of the lifting equipment, ensuring the stability of the node protection structure. To further improve seismic reliability, a set screw (not shown in the figure) is threaded through the bottom of the lower assembly connection lug 33. When the alignment plug rod 334 is in the locked position (i.e., the protrusion 338 is embedded in the limiting groove 341), tightening the set screw will abut against the outer wall of the alignment plug rod 334, preventing its axial movement. This set screw should be loosened before adjusting the bolt 34 or the threaded rod 332.

[0058] All plug-in fits, threaded fits and sealing structures are designed with allowances for thermal expansion and contraction. Sealing strips I311 and II324 are made of high and low temperature resistant elastic rubber to adapt to deformation under extreme temperature differences in mining environments, thus preventing structural jamming or sealing failure.

[0059] Workflow

[0060] When assembling the entire frame, firstly, the tube 13 is fixedly installed on the outer side of the bottom of the frame base 11. The pre-fabricated corrugated reinforcing web 12 is sent from the end of the frame base 11 into the inner hollow cavity. After adjusting the placement and spacing of the corrugated reinforcing web 12 and confirming that the crest position is completely in contact with the inner wall of the cavity, the corrugated reinforcing web 12 is fixedly connected to the inner wall of the frame base 11 and the tube 13 by spot welding. The stress dispersion and strengthening treatment inside the main beam 1 is completed by relying on the corrugated structure.

[0061] The frame base 11 and the sealed partition plate 17 are joined together and fixed in place by welding to form the complete main structure of the box-type main beam 1. After the welding is completed, the surface of the weld is cleaned of impurities. The L-shaped magnesium-based sacrificial anode insert 18 with insert strip 19 is smoothly inserted into the slot 110 pre-set on the outer wall of the frame base 11 and the sealed partition plate 17, completing the assembly of the anti-corrosion base on the outside of the weld. Then, the breathable ceramic isolation liner 111 is attached to the outside of the magnesium-based sacrificial anode insert 18, and the liner is fixed and installed through the extension connecting sections 112 on both sides, completing the layout of the complete anti-corrosion protection structure at the weld position of the main beam 1.

[0062] Prestressed steel strands 16 are inserted into the pipe fitting 13. The prestressed anchoring components 15 are installed on the connecting seats 14 at both ends of the main beam 1 to tension the prestressed steel strands 16. The tension is adjusted to make the main beam 1 form a pre-arch shape that meets the usage requirements, thus completing the optimization and debugging of the load-bearing performance of the main beam 1.

[0063] The multiple main beams 1, which have been processed and debugged, are welded and assembled with the transverse load-bearing beams 2 to form a complete frame support structure. The anti-seepage protection assembly 3 is then installed in sequence from both ends of the transverse load-bearing beams 2. The bolts 34 are rotated to adjust the enclosing range of the two sets of U-shaped protective covers I 31, so that the U-shaped bonding plates II 32 are tightly attached to the outer wall of the main beams 1, thus completing the basic assembly of the anti-seepage protection structure at all nodes.

[0064] When the equipment is officially put into daily operation in the mine, the corrugated reinforced web 12 inside the main beam 1 continuously disperses and guides the stress generated by various operating loads, preventing cracking of the frame welds in low-temperature environments. The prestressed steel strands 16 inside the bottom pipe 13 are always kept in a stable tension state, relying on the preset pre-arch shape to offset the downward bending deformation caused by the lifting load, ensuring the structural stability of the frame during heavy-load operations. The magnesium-based sacrificial anode inserts 18 mounted on the outside of the frame welds continuously play an electrochemical cathodic protection role, constantly consuming their own material to protect the frame base material from corrosion. The breathable ceramic isolation liner 111 on the outside not only prevents hard materials from wearing down the anode components, but also ensures the normal flow of anti-corrosion media, maintaining the long-term operation of the anti-corrosion function. The sealing strips I311 and II324 at the joint of the main beam 1 and the transverse load-bearing beam 2 form a sealing and protective layer, which prevents external acidic liquids and mud from seeping into the joint gap. A small amount of seeping liquid can be quickly discharged through the drainage holes I312 and II325, and will not accumulate at the joint.

[0065] During routine equipment inspection and maintenance, if workers find that the sealing strip is worn and loose, they can use a hexagonal tool to insert into the internal hexagonal drive hole 335, press the alignment rod 334 inward to release the locking state of the bolt 34, flexibly rotate the threaded rod 332 to push the embedded positioning plate 322 to move, readjust the adhesion and clamping force of the sealing strip II 324, and release the tool after adjustment to automatically complete the locking and fixing. When the magnesium-based sacrificial anode insert 18 suffers severe corrosion and wear after long-term use and can no longer provide anti-corrosion protection, workers can directly pull out the aged magnesium-based sacrificial anode insert 18 along the direction of the slot 110 and replace it with a brand new insert component to complete the maintenance work. The entire replacement process does not require welding, cutting or other processes, the operation is simple and convenient, and will not cause any damage to the main structure of the frame, which can effectively reduce the later maintenance cost and maintenance time of mining equipment.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A mining crane frame with corrosion resistance, low-temperature toughness, and high load-bearing capacity, comprising: The frame consists of two main beams (1) and multiple transverse load-bearing beams (2); The main beam (1) is characterized in that it includes a frame base (11) and a sealed partition plate (17). The frame base (11) and the sealed partition plate (17) are welded and fixed. A first protective component is provided at the weld joint. The first protective component includes a magnesium-based sacrificial anode insert (18) attached to the weld joint and a breathable ceramic isolation liner (111) attached to the outside of the magnesium-based sacrificial anode insert (18). The magnesium-based sacrificial anode insert (18) preferentially corrodes through the electrode potential difference to provide cathodic protection for the weld joint and the base material. Multiple seepage prevention and protection assemblies (3) are respectively fitted onto the outer end of the transverse bearing beam (2) to prevent corrosive liquid from eroding the butt weld between the main beam (1) and the transverse bearing beam (2); The bottom wall of the frame base (11) is provided with pipe fittings (13) along the length direction. Prestressed steel strands (16) are passed through the inside of the pipe fittings (13). Connecting seats (14) are fixed at the bottom of both ends of the frame base (11). The connecting seats (14) are equipped with prestressed anchoring components (15). The two ends of the prestressed steel strands (16) are fixed and tensioned with the prestressed anchoring components (15) to form the pre-arch of the main beam to offset the deflection under heavy load. Multiple corrugated reinforcing webs (12) are embedded inside the frame base (11). The upper corrugated peaks of the corrugated reinforcing webs (12) are spot-welded to the top wall of the frame base (11), and the lower corrugated peaks of the corrugated reinforcing webs (12) are spot-welded to the outer wall of the pipe fittings (13) arranged on the bottom wall of the frame base (11) to disperse load stress and improve low-temperature toughness. The seepage prevention and protection assembly (3) includes two U-shaped protective covers I (31) that are arranged in opposition. One side of the U-shaped protective cover I (31) is integrally fixed with a U-shaped bonding plate II (32) that abuts against the main beam (1). Two assembly connecting lugs (33) are fixed between the U-shaped protective cover I (31) and the U-shaped bonding plate II (32). A bolt (34) is provided between the two upper and lower opposite assembly connecting lugs (33). Nut rings are fixed at the bottom of the two lower assembly connecting lugs (33). The bottom end of the bolt (34) is threadedly engaged with the nut ring. The mating distance between the two U-shaped protective covers I (31) can be adjusted by rotating the bolt (34). Multiple sealing strips I (311) are fixedly connected to the inner side of the U-shaped protective cover I (31). Multiple sealing strips II (324) that abut against the main beam (1) are provided on the side of the U-shaped bonding plate II (32) near the main beam (1). The sealing strips I (311) and II (324) work together to form a multi-layer sealing barrier to prevent external corrosive liquids from seeping into the joint gap. The bottom of the U-shaped bonding plate II (32) below is provided with multiple drainage holes I (312), the drainage holes I (312) are located between two adjacent sealing strips I (311), and drainage holes II (325) are provided at the bottom of the U-shaped bonding plate II (32) below and at the bottom of the multiple sealing strips II (324) below. The top of the assembly connecting ear (33) is fixedly connected to an internal threaded sleeve (339), and the internal threaded sleeve (339) is engaged with a threaded rod (332). The U-shaped fitting plate II (32) has a U-shaped receiving groove (321) on its inner side. An embedded positioning plate (322) is embedded in the U-shaped receiving groove (321). Multiple sealing strips II (324) are fixedly connected to the embedded positioning plate (322). One end of the threaded rod (332) abuts against the embedded positioning plate (322). The abutment force between the sealing strips II (324) and the main beam (1) can be adjusted by rotating the threaded rod (332).

2. The mining crane frame with corrosion resistance, low-temperature toughness, and high load-bearing capacity according to claim 1, characterized in that, The top wall, bottom wall and outer side of the sealed partition plate (17) of the frame base (11) are provided with slots (110). The magnesium-based sacrificial anode insert (18) is L-shaped, and its two inner sides are integrally provided with insert strips (19) that are inserted into the slots (110).

3. A mining crane frame with corrosion resistance, low-temperature toughness, and high load-bearing capacity according to claim 2, characterized in that, The breathable ceramic insulating liner (111) is adapted to the contour of the magnesium-based sacrificial anode insert (18), and both sides are integrally provided with an extension connecting section (112). The two extension connecting sections (112) are respectively fixed to the frame base (11) and the sealed partition plate (17).

4. A mining crane frame with corrosion resistance, low-temperature toughness, and high load-bearing capacity according to claim 1, characterized in that, The lower embedded positioning plate (322) has multiple positioning pins (323) fixedly connected to its top, and the upper embedded positioning plate (322) has holes at its bottom that are inserted into the positioning pins (323) to prevent misalignment during use.

5. A mining crane frame with corrosion resistance, low-temperature toughness, and high load-bearing capacity according to claim 4, characterized in that, The threaded rod (332) has an alignment insertion hole (333) at its outer end. An alignment insertion rod (334) for limiting the bolt (34) is slidably embedded in the alignment insertion hole (333). An axial limiting sleeve (331) for limiting the alignment insertion rod (334) is fixedly connected to the top of the assembly connecting lug (33). An annular limiting retaining ring (336) and a spring (337) are sleeved on the outer wall of the alignment insertion rod (334). The annular limiting retaining ring (336) is located on one side of the bolt (34). The two ends of the spring (337) abut against the outer side of the annular limiting retaining ring (336) and the outer end of the alignment insertion rod (334), respectively. The spring (337) is used to drive the alignment insertion rod (334) to reset.

6. A mining crane frame with corrosion resistance, low-temperature toughness, and high load-bearing capacity according to claim 5, characterized in that, The outer wall of the alignment plug rod (334) is fixed with a plurality of protrusions (338), the alignment plug hole (333) is provided with a groove that matches the protrusions (338), the outer wall of the bolt (34) is provided with a plurality of limiting grooves (341) that match the protrusions (338), and the outer end of the alignment plug rod (334) is provided with an internal hexagonal drive hole (335). Push the alignment plug rod (334) to disengage the protrusion (338) from the limiting groove (341). Rotate the threaded rod (332) or bolt (34). After loosening, the spring (337) drives the alignment plug rod (334) to reset, and the protrusion (338) is embedded in the limiting groove (341) to achieve locking.

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